JPS617415A - Sensor attaching device - Google Patents

Abstract

PURPOSE:To fix an atmosphere sensor to an air exhaust guide simply, by bringing only the atmosphere sensor to the specified attaching position of the air exhaust guide, and bending or twisting pawls. CONSTITUTION:When an atmosphere sensor 8 is fixed to an air exhaust guide 7, the atmosphere sensor 8 is brought to the air exhaust guide 7. Pawls 17 and electrodes 9 of the atmosphere sensor 8 are inserted into slits 18a and 18b of the air exhaust guide 7 corresponding to the pawls 17 and the electrodes 9. Thereafter, the pawls 17 are bent or twisted. By this work, the atmosphere sensor 8 is fixed to the air exhaust guide. Thus, other attaching metal parts or screws are not required as in the conventional methods. The number of parts can be reduced. The work for bringing parts can be omitted.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention places food in a heating chamber, and detects changes in water vapor, hot air, evaporated gas, etc. emitted from the food according to the degree of heating of the food using an atmosphere sensor. Related to sensor attachment devices for cookers, etc. that automatically heat and cook food, controlling heating time, heating power, heating capacity, etc. in order to achieve the best heating state of food according to the detected information. It is.

Structure of the conventional example and its problems For example, in the conventional high-frequency heating cooker shown in FIG. A blower 3 that sends air into the heating chamber that houses the heating chamber, a waveguide 4 that guides the high-frequency electromagnetic field generated from the magnetron tube 2 to the heating chamber, and a ventilation hole 6 on the ceiling of the heating chamber to the outside of the cooking device. It consists of an exhaust guide 7 that guides the air coming out of the heating chamber, and an atmosphere sensor 8 that detects water vapor, hot air, evaporative gas, etc. contained in the air coming out of the heating chamber.
As shown in the figure, it is fixed to the exhaust guide 7 near the ventilation hole 6. Air that changes in the food atmosphere in the heating chamber, such as water vapor, hot air, and evaporative gas, depending on the degree of heating of the food 5 passes through a ventilation hole 6 provided in the ceiling of the heating chamber, hits the atmosphere sensor 8, and then flows along the exhaust guide. and is released outside the cooker.

In this way, the atmosphere sensor 8 detects the heating state of the food 5 using air as a medium. This high-frequency heating cooker controls the heating time and heating power based on the information obtained from the atmosphere sensor 8 to achieve the best heating state of the food 5.

Here, FIGS. 3 and 4 show how the atmosphere sensor 8 is fixed to the exhaust guide. The atmosphere sensor 8 has four electrodes 9 and holds a sensor element 11 covered with a wire mesh 10 for protecting the sensor part. Fixed. In order to fix this atmosphere sensor 8 to the exhaust guide 7, a fixing metal fitting 13 and two screws 14 are used, and it is fixed near the ventilation hole 6 on the ceiling of the heating chamber.

In the case of this installation method of the crystal enclosure sensor 8, the fixing bracket 1
3 and the atmosphere sensor 8 are separated, so bring the atmosphere sensor 8, place it at the position of the hole 15 of the exhaust guide, and then bring the fixing bracket 13 and position it above the atmosphere sensor 8. After aligning the items, I decided to place them, and I had to bring the two items to the same location and place them. In other words, this means duplication of the same work, which is a problem that hinders efficiency and shortening of production time when producing large quantities of equipment.

Purpose of the Invention The present invention solves the drawbacks of the prior art as described in L. It is an object of the present invention to fix the atmosphere sensor by simply bringing it to a predetermined position on the exhaust guide without requiring a separate fixing fitting for fixing it. The purpose is to

Structure of the Invention In order to achieve the above object, the present invention provides a base for fixing an electrode connected to a sensor element, a mesh that protects the sensor element and allows ventilation of the atmosphere, and a metal ring that fixes between the base and the mesh. The metal ring has two or more cutout claws provided on opposite sides of the mesh, and cutout slits corresponding to the electrodes and claws of the atmosphere sensor provided in the exhaust guide, respectively,
After passing the electrode and the claw through the slit, the atmosphere sensor is fixed to the exhaust guide by bending or twisting the claw.

It is possible to fix the atmosphere sensor to the exhaust guide by bringing only the atmosphere sensor to the specified mounting position on the exhaust guide and then bending or twisting the tabs. This eliminates the need to carry the parts to the same location, which has the effect of reducing the number of parts and shortening the assembly time.

Furthermore, when the exhaust guide has a substantially rectangular box configuration, the wall of the exhaust guide serves as a sensor element protection wall and the resensor element protection net can be removed, further reducing the number of parts and conserving resources. It is effective.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 5, the atmosphere sensor 8 has an inorganic ceramic base 16 that fixes a metal electrode 9 connected to a sensor element (not shown), and a diameter that protects the sensor element and allows air to flow out from the heating chamber. A metallic mesh having pores of 3 MM or less, a base 16 and a mesh 10 made of these inorganic ceramics.
A metal ring 12 that fixes between the metal ring 12 and the metal ring 12.
2 or more claws 17 with a width of 5111#I or less and a length of 10 or less provided on the opposite side of the net 10, and the electrodes 9 and claws 17 of the atmosphere sensor 8 provided on the exhaust guide 7, respectively. The slit 18a corresponding to the claw 17 has a gap of Q, 5 mm or less when the claw 17 is inserted, and the end face of the slit 18b corresponding to the electrode 9 and the electrode 9 The configuration is such that the shortest distance is 5 mtn or less.

The operation of the above configuration will be explained below.

The method of fixing the atmosphere sensor 8 to the exhaust guide 7 is to hold the atmosphere sensor 8 and attach the sulins 118a and 18 of the exhaust guide 7 corresponding to the tabs 17 of the atmosphere sensor 8 and the electrodes 9, respectively.
Insert the claw 17 and electrode 9 into b.

After that, bend the tab 17 or
to sleep. With this operation, fixing of the atmosphere sensor 8 to the exhaust guide 7 is completed.

In this way, according to the present embodiment, there is no need to use the mounting bracket 13 or screws 14 separate from the atmosphere sensor 8 as in the conventional example, resulting in the effect of resource saving by reducing the number of parts. The effect of improving production efficiency is obtained by shortening production time by eliminating the work of bringing parts.

Furthermore, when the exhaust guide 7 is approximately rectangular and has a box-like configuration,
The wall of the exhaust guide 7 serves as a protective wall for the sensor element, and even if the sensor element protection screen 10 is removed, if the atmosphere sensor 8 is always handled with it installed in the exhaust guide 7, the sensor element will not be directly exposed to other objects. No more touching structures. As a result, it is possible to expect the effect of resource saving due to the reduction in the number of protection nets 10.

In addition, by constructing the base 16 for fixing the electrode 9 from inorganic ceramic, the atmosphere in the heating chamber can be increased to 250'.
It can also be used in cooking appliances such as electric ovens and scum combustion ovens that heat from 300°C to 300°C.

In addition, in the previous embodiment, the atmosphere sensor 8 was fixed to the exhaust guide 7, but the ventilation hole of the protective net 10 is made of metal with a diameter of 3 mm or less, and is further fixed by the claw 17 with an L that is closely attached to the metal ring 12. Therefore, even if a slit is provided in the ceiling of the heating chamber and the atmosphere sensor 8 is fixed so as to protrude from the ceiling of the heating chamber, the high-frequency electromagnetic field is blocked by the metal net 10, metal ring 12, and claw 17, and the sensor Since it does not reach the element, it has the effect of being able to detect changes in the state of water vapor, hot air, evaporative gas, etc. in the food atmosphere more quickly than in the exhaust guide.

Furthermore, the end face of the slit 18b corresponding to the electrode 9 and the electrode 9
By ensuring a minimum distance of 5 or more, the water vapor coming out of the heating chamber is cooled by the exhaust guide 7, and even if drops of condensation accumulate on the exhaust guide wall, it will not reach between the electrodes 9. Therefore, there is no abnormality in the detection information of the atmosphere sensor 8 due to dew condensation.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) Since no fixing metal fittings or hissers are used, production time can be shortened by saving resources and eliminating redundant work.

(2) When the exhaust guide is a substantially rectangular parallelepiped, resources can be saved by eliminating the protective net.

0) Since the base is made of inorganic ceramic, the sensor part can be used at 250°C to 300°C.

(4) Since the size of the ventilation holes in the protective net is about 3 mm or less in diameter, it can be used by protruding into the heating chamber, and changes in the state of the food can be detected quickly without being affected by high-frequency electromagnetic fields.

(5) Since the distance between the electrode and the end face of the slit is 5 mm or more, abnormalities in the detection information of the atmosphere sensor due to deterioration of the insulation between the electrodes caused by drops of condensation within the exhaust guide will not occur.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway perspective view of a conventional high-frequency cooking device with the side plate removed; Figure 2 is a sectional view including the heating chamber showing the atmosphere sensor in Figure 1; Figure 3; is a broken cross-sectional view of the exhaust guide including the atmosphere sensor in Figure 1, and Figure 4 is a cross-sectional view of the exhaust guide including the atmosphere sensor in Figure 1.
FIG. 5 is an exploded perspective view of a main part related to attachment of the atmosphere sensor shown in FIG. 5, and FIG. 1...High voltage transformer, 2...Magnetic tube, 5
...Food, 6...Vent, 7...
・Exhaust guide, 8... Atmosphere sensor, 9...
... Electrode, 10 ... Net, 11 ... Sensor element, 12 ... Ring (frame), 13 ... Mounting bracket, 15 ...・Hole, 16...Base,
17...Tlaw, 18...Slit. Name of agent: Patent attorney Toshio Nakao and 1 other person5
Type I Figure 3 Figure 4 Figure 5 Figure 6 Procedural amendment (method) ■Indication of the case 1982 Patent Application No. 31605 2 Name of the invention Sensor mounting device 3 Person making the amendment Relationship with the case Patent Application
Address: 1006 Kadoma, Kadoma City, Osaka Prefecture
Name (582) Matsushita Electric Industrial Co., Ltd. Representative Toshihiko Yamashita 4 Agent 571 Address 7, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Statement of Contents of Amendment, page 10, line 4~ Line 6 [Figure 5 is...
・The perspective view "0" will be corrected as follows. .”

Claims (1)

[Claims] (1) A base that fixes an electrode connected to a sensor element of an atmosphere sensor, a net that protects the sensor element and allows ventilation of the atmosphere, a metal frame that fixes the base and the net, and a metal frame that Two or more claws provided on the opposite side of the net with a ring and protruding in the same direction as the electrodes, a metal exhaust guide in contact with the atmosphere in the heating chamber, and the electrodes and claws of the atmosphere sensor provided on the exhaust guide, respectively. a slit, the atmosphere sensor is fixed to the exhaust guide by passing an electrode and a claw through the slit and bending or twisting the claw.